jerrypeng commented on code in PR #38430:
URL: https://github.com/apache/spark/pull/38430#discussion_r1010692304
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sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/HDFSMetadataLog.scala:
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@@ -277,10 +295,34 @@ class HDFSMetadataLog[T <: AnyRef :
ClassTag](sparkSession: SparkSession, path:
for (batchId <- batchIds if batchId > thresholdBatchId) {
val path = batchIdToPath(batchId)
fileManager.delete(path)
+ if (metadataCacheEnabled) batchCache.remove(batchId)
logTrace(s"Removed metadata log file: $path")
}
}
+
+ /**
+ * List the available batches on file system. As a workaround for S3
inconsistent list, it also
+ * tries to take `batchCache` into consideration to infer a better answer.
+ */
+ protected def listBatches: Array[Long] = {
+ val batchIds = fileManager.list(metadataPath, batchFilesFilter)
+ .map(f => pathToBatchId(f.getPath)) ++
+ // Iterate over keySet is not thread safe. We call `toArray` to make a
copy in the lock to
+ // elimiate the race condition.
+ batchCache.synchronized {
+ batchCache.keySet.asScala.toArray
Review Comment:
We need to return a scala array not a Java array.
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